Lasagna (2)

1 lb. ground beef 1 tablespoon salad oil 1 jar (32 oz.) meatless spaghetti sauce 1 jar (8 oz.) meatless spaghetti sauce 1/2 pkg. Mueller’s lasagna 1 lb. ricotta cheese 8 oz. shredded mozzarella cheese 1/2 cup grated Parmesan cheese...